Advantech B+B SmartWorx IE-iMcV-2xLIM, Руководство пользователя

Страница: 9 / 15

IE-iMcV-2xLIM
8
FX LINKLOSS, TX LINKLOSS, LINK FAULT PASS-
THROUGH, FAR END FAULT
IE-iMcV-2xLIM, TX/SFP modules include the troubleshooting features: TXLL,
FXLL, FEF and LFPT that help locate silent failures on a network. Before
attempting to install the module(s), it is advised to understand how these features
work and react to a specific network configuration.
LINK INTEGRITY
During normal operation, link integrity pulses are transmitted by all point-to-point
Ethernet devices. When a B+B SmartWorx media converter receives valid link
pulses, it knows that the device to which it is connected is active and sending
pulses, and that the copper or fiber cable coming from that device is intact. The
appropriate “LNK” (link) LED is lit to indicate this.
The media converter also sends out link pulses from its copper and fiber
transmitters, but normally has no way of knowing whether the cable to the other
device is intact and the link pulses are reaching the other end. The combination
of FEF and LinkLoss allows this information to be obtained, even when physical
access to a remote device (and its link integrity LED) is not available.
FX LINKLOSS (FXLL)
FX LinkLoss is a troubleshooting feature. When enabled, if a fault occurs on the
fiber segment of a conversation, FX LinkLoss detects the fault and passes this
information to the twisted pair segment. If a media converter is not receiving a
fiber link, FX LinkLoss disables the transmitter on the media converter’s twisted
pair port. This results in a loss of link on the device connected to the twisted pair
port, and the TXLL LED will blink.
TX LINKLOSS (TXLL)
TX LinkLoss is a troubleshooting feature. When enabled, if a fault occurs on the
twisted pair segment of a conversion, TX LinkLoss detects the fault and passes
this information to the fiber segment. If a media converter is not receiving a
twisted pair link, TX LinkLoss disables the transmitter on the media converter's
fiber port. This results in a loss of the link on the device connected to the fiber
port, and the FXLL LED will blink.